基于上下文感知的智能手机隐式身份认证机制

doi:10.13190/j.jbupt.2019-043

北京邮电大学学报 ›› 2019, Vol. 42 ›› Issue (6): 118-125.doi: 10.13190/j.jbupt.2019-043

基于上下文感知的智能手机隐式身份认证机制

王任重, 陶丹

北京交通大学电子信息工程学院, 北京 100044

收稿日期:2019-03-28 出版日期:2019-12-28 发布日期:2019-11-15
通讯作者: 陶丹(1978-),女,教授,E-mail:dtao@bjtu.edu.cn. E-mail:dtao@bjtu.edu.cn
作者简介:王任重(1995-),女,硕士生.
基金资助:
国家自然科学基金项目（61872027）

Implicit Authentication Mechanism Based on Context Awareness for Smartphone

WANG Ren-zhong, TAO Dan

School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China

Received:2019-03-28 Online:2019-12-28 Published:2019-11-15

摘要/Abstract

摘要： 针对现有智能手机隐式认证方法难以被实际应用的情况，提出了一种基于上下文感知的隐式身份认证机制.首先，由智能手机内置传感器（加速计、陀螺仪、磁力计）获取点击行为数据；然后从这些数据中提取上下文特征以识别上下文信息（用户的身体姿势状态），同时提取点击特征为每个上下文训练相应的认证子模型用于认证；最后利用所收集的7000+数据进行实验评估.结果表明，该方案对不同用户进行认证所得的平均错误接受率和错误拒绝率分别为1.29%和1.03%，与无上下文感知的认证方法相比，平均错误接受率和错误拒绝率分别降低了1.72%和2.59%.所提的机制可有效提高身份认证的准确性.

关键词: 上下文感知, 隐式认证, 身体姿势

Abstract: Considering that the existing implicit authentication method for smartphone is difficult to be applied in practice, an implicit authentication mechanism based on context awareness was proposed. Firstly, the tapping behavior data acquired by embedded sensors (i.e. accelerometer, gyroscope, and magnetometer) of the smartphone is used to identify the context information (that is, the user's body posture state). Then, the context feature and tapping feature is extracted from the data after noise elimination which is employed to train the corresponding authentication sub-model for each context. Experiment evaluation is performed using the collected 7000+ data. It is shown that the average false acceptance rate (FAR) and false rejection rate (FRR) of the proposed scheme for different users is 1.29% and 1.03% respectively. Compared with the authentication method without context awareness, FAR and FRR is reduced by 1.72% and 2.59% respectively. The proposed mechanism can effectively improve the accuracy of authentication.

Key words: context awareness, implicit authentication, body posture

中图分类号:

TP391.4

王任重, 陶丹. 基于上下文感知的智能手机隐式身份认证机制[J]. 北京邮电大学学报, 2019, 42(6): 118-125.

WANG Ren-zhong, TAO Dan. Implicit Authentication Mechanism Based on Context Awareness for Smartphone[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2019, 42(6): 118-125.

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基于上下文感知的智能手机隐式身份认证机制

Implicit Authentication Mechanism Based on Context Awareness for Smartphone

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